教宗若望十世（拉丁文：Ioannes X，？－928年），914年3月—928年5月在位。

John X redirects here. It can also refer to John X of Antioch.

Pope John X can also refer to Pope John X of Alexandria.

Pope John X (Latin:Ioannes X; died c. June 928) was Pope from March 914 to his death in 928. A candidate of the Counts of Tusculum, he attempted to unify Italy under the leadership of Berengar of Friuli, and was instrumental in the defeat of the Saracens at the Battle of Garigliano. He eventually fell out with Marozia, who had him deposed, imprisoned, and finally murdered. John’s pontificate occurred during the period known as the Saeculum obscurum.